Safety shield



Pateniedoct. s, 1940 v www n lsAFl-:TY SHIELD i Rudolph RfTeiclinerQJackso'n Heights, N. Y., ask-` signor to Westem Electric Company, Incorporated, New York, N. Y.; a corporation of New Yorkf Application september 1.1938, seriaiN. 227,979

M'4c1ainis. (orsi- 272) This invention .relates to) safety shieldsgor guards. and particularly to illuminated .shields orv guards for protecting the users of rotating machines such as grinding Wheels, bufling wheels,

circular saws and the like. The object of the present invention is `toprovide an efcient and practical shield or guardof the illuminated type which lcan'be readily lspaced to and from the rotating machine@l In accordance with the above-object, the invention in one embodiment thereof is illustrated as applied to a grinding machine which Vincludes a housing. A frame is mounted on the. housing having a plurality of adjustments relative to the4 grinding wheel surface and havingrecesses at each end within eachof whichis supported an electric lamp for illuminating the work and wheel from each side. frame supports two layers of transparentrmaterial through which the work may be observed,

the outer layer of. material being shatter-proof and the inner layer plain material to protect the former from abrasion in the ordinary userof the grinding machine. -Means is provided for expeditiously releasing and replacing either of the layers of material.

Other objects and advantages of this invention will more fully appear from the following detailed description, taken in connection with the accompanying drawing, in which:

Fig. l is a fragmentary side view of a grinding wheel housing having mounted thereon a work illuminating and shield or guarding device embodying the features of this invention;

Fig. 2 is a plan view thereof;

Fig. 3 is a front elevational view thereof, and

Fig. 4 is an enlarged detail section taken on the line 4-4 of Fig. 2.

In the drawing, the usual simple form of grinding wheel and housing or hood therefor is shown by way of illustration. Referring to Fig. 1, the grinding Wheel and housing or hood are indicated at IU and II, respectively. Fixed to the housing II is a bracket I2 to the outer surfaces of which are clamped a pair of pivotally adjustable arms I3 by means of a bolt extending through apertures in the bracket and arms and a thumb nut I4, the opposed abutting surfaces of the bracket and arms being serrated as indicated at I1 to provide firm clamping action therebetween. At

. their free ends the arms I3 are formed with integral collars I8 in which are entered rods I9. The rods I9 are adjustable longitudinally in the collars I8 and when the desired adjustment is Intermediate thelamps the.

.reachedtnumb screws', 2o thraoedirito the co1-v larws I8 arer tightened against Vfiat surfaces 2l on the rods. Supported upon the endsof the rods" I9 vancl extending ytoward the'front o1' the operators position 4ofv thefgrinding machine is a rec- 5 tangular frame 24, the rods being: entered in andpinned at 25v to any apertured extension 26 ofthe frame. 1 f

Vvvr`The .frame 2,4 is formed with av rectangular` shaped aperture?! Fig/l) which extends across 10 the greater portion of 'its length andiintermediate the ends of the frame. Surrounding the aperture ,21 is a shouldered surface 28 r(Fig. 4) upon which is cemented a gasket 3Ivof rubber or other suitable material:A Resting upon the gasket 3I 15 y' is a non-laminated sheet; such as a pane 32 of plain glass and resting upon the latter is a layer of material comprisinga laminated shatter-proof structure. such as a pane 33of shatter-proof orsafety glass. Although the panes 32 and 33 are 20 inthe present embodiment described as of glass, any other suitable material may'be substituted therefor. VUpon the pane 33 is cemented'a gas#y Yketill similar to'zthe gasket 3|, A retainer'frame 35 for the panes of glass 32 and 33 surrounds 25 and abuts the outer gasket 34 and-engages the upper surface of the frame 24. The longitudinal sides of the retainer frame 35 are formed with depending flanges 38 for engaging similar sides ofthe frame 24, the flange at one yside being cut 3 away to clear the extension 26 of the frame 24. Spring clips 39 attached by screws to the frame 24 at each end of the retainer frame 35 'and pressing against the upper surface thereof maintain the retainer frame in position. loosening the screws and rotating the clips 39 the retainer frame may be removed and either of the panes 3 2 and 33. of glass replaced.l

The frame 24 at each end outside the ends of the panes of glass 32 and 33 are irregularly re- 40 I cessed as indicated at 40. Retained by a clamping member '4I in one portion 42 of each recess is a lamp socket 43, the recessportion being suitably shaped to receive and position the socket.

The socket 43 carries an electric lamp 44, the lamp extending into an enlarged portion 45 of the recess 40. The Walls of the recess portions 45 for the lamps are curved upwardly and downwardly around the lampand adapted to direct 0 light from the lamps to both sides of the grind-v ing wheel ID as well as the Work and without y interfering With the vision of the operator when the frame 24 rhas been properly adjusted by means of the pivotal arms I3 and the longitudi- 55' By un-35 Y' intended to be covered by the scope of nally adjustable rods I9. A standard BX cable 46 is secured in an aperture 4l of the frame eX- tension 25 by a clamping screw 48. Communicating with the aperture 41 are channels 49 in which are laid conductors 50 (Fig. 4) interconnecting conductors 52 of the cable 46 and terminals of the lamp sockets 43. A cover plate 53 for the greater portions of the channels 49 retains the conductors 50 in position.

From the above description it will be obvious Y that the frame 24 carrying the lamps 44 has a plurality of adjustments whereby the work and the wheel IIJ may be eiciently illuminated in a manner best suited to an operator and without interfering with his vision whiler observing the work through the transparentpa'nes of shatterproof and plain glass carriedin the frame. It will be apparent that by using an outer pane of shatter-proof glass and an inner pane of plain glass that the shatter-proof glass pane will be fully protected from abrasion in the ordinary use of the grinding machine by the pane of plain glass and upon the latter being damaged or marred it may be `einoeditiously removed and replaced by releasing the spring clips 39.

Various modifications and applications of the invention will suggest'themselves to those skilled in the art, and such modications and applications as fall within the spirit of the invention are the appended claims. Y

What is claimed is: i

l. In a guarding device, a frame supporting outer and inner abutting panes of glass for observing work being performed, the outer pane being shatter-proof and the inner pane being plain glass effective to protectthe former from abrasion,l and means for adjustably supporting said frame with respect to the work.

2. In a work illuminating andguarding ldevice for grinding wheels, a frame having a shouldered recess. outer and inner layers oi transparent material supported in said recess for observing work being performed at a grinding wheel, the outer layer of material being shatter-proof and the inner layer being plain material effective to protect the former from abrasion in the ordinary use of the grinding wheel, a frame supported on said rst frame and surrounding said recess for retaining said layers of transparent material in said recess. and resilient members xed to said frame and engaging said retainer frame for releasably holding the retainer frame in position.

3. In a work illuminating and guarding device for a grinding wheel, a frame supporting outer and inner layers of transparent material for observing work being performed, the outer layer of material being a laminated shatter-proof structure and the inner layer being a readilyseparable non-laminated sheet effective to protect the former from abrasion, said frame having integral portions at each end outside of the transparent material, each of said portions having an irregularly shaped recess at each end, an electric lamp socket positioned in one portion of said recess which isshaped to receive the same, a clamping member for retaining said ylamp socket in said recess portion, and a lamp connected to said socket and positioned in another portion of said recess, said lamp recesses provided with upwardly and downwardly curved walls to direct light from the lamps to both sides of the work.

4. In grinding apparatus having a grinding tool, a frame supporting outer and inner layers of transparent material for observing work being performed at 'said tool, the outer layer of material being a laminated shatter-proof structure and the inner layer being a readily separable non-laminatedsheet effective to protect the former from abrasion, and means for adjustably supporting said frame in a plurality of directions with respect to the Work and tool, said means comprising a pivotally adjustable support and means longitudinally adjustable in said support and carrying said frame eiective to permit horizontal movement of said frame. f

t RUDOLPH R. TEICHNER. 

